could represent as much as 10% of the aviation work force on any given day, a leading to less security, law under way times and the fewer -- long the wait times unless a jury. -- and less security. >> you are tired and people have little kids and all of that. i don't think that would be a good idea. >> long wait times may be just the beginning. secretary ray la hood says control towers may be close altogether. >> at this point, there is no list of which airports could be temporarily shut down, but the transportation secretary said it would be those with fewer than 150,000 passenger operations per year. reagan national will likely see longer lines and fewer flights. >> earlier this week, we discussed how parks in the area could be impacted. now we will look at changes across the nation. according to a national park service's memo, there will be fewer rangers, locked restrooms and trash cans will be emptied less often. this could also impact student education at gettysburg. >> we are feeling the impact of the storm that hit the midwest this week. a winter weather advisory is in effect in part